Assigned 2/4/04.   Due 2/8/04 midnight.

Please submit the answers in .txt format.  Submit to CMS.  If you still
can't access CMS, and haven't already sent mail to Joe, then please
send mail to Joe (jdh46@cornell.edu).


netid: 


Question 1.1:

In class, I described how the packet header always contains two fields,
the "length" field and the "where" field.  The length field is used to
determine where the next packet begins.  (1.1.1) Can you think of another way
of delimiting the boundaries of variable length "chunks of data" that
does not require a length field per se.  (1.1.2) If so, what are the pros and
cons of this way compared to the packet length field?



Question 1.2:

As we all know, phone numbers are assigned on a geographic basis.  Each
country has a country code assigned to it, and only phones within the
boundaries of that country will have that number.  In the USA, each area
code defines a geographic region, and phones physically within that region
will have that phone number. (1.2.1) How does this differ from the way that IP
prefixes are assigned?  (1.2.2) What, if anything, does the value of an 
IP prefix tell us about where physically a given host with that prefix is?
(1.2.3) What effect does this have when, say, a site if moved from one
physical location to another physical location far away?  (1.2.4)  What
effect does this have when a site changes from one ISP to another ISP?